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| Number | Title | Issue Date |
| 4290631 | Submarine pipe construction A plurality of sealed tubes, pipes or the like constituting the wall of a relatively large diameter pipe that is susceptible of being submerged and which has buoyant or semibuoyant walls. The tubes or pipes are arranged parallel to one another in a circul... | 09/22/1981 |
| 4290736 | Oil pump having a suction and pressure pipe arrangement An oil pump is disclosed having a pressure pipe which is coaxially disposed within a suction pipe to provide a shielding of the pressure pipe. Both the suction pipe and the pressure pipe are arranged parallel to a vertical axis of a housing of the pump. A... | 09/22/1981 |
| 4285369 | Thermal insulation enhancement A core element, as for example a pipe, tube, hose or the like, has thermal insulation applied thereto in the form of a plurality of layers of tape applied in a continuous process in which conditions are selected to deliberately create wrinkles thereby def... | 08/25/1981 |
| 4279270 | Flexible antifreeze heatconductor liquid transfer connector hose This invention constitutes an improvement in a liquid transfer connector hose for the purpose of facilitating an unencumbered transfer of liquids between two points, such as a liquid conductor means of either a permanent or temporary nature, under conditi... | 07/21/1981 |
| 4275771 | Interlocking truncated triangular insulator A two-piece, interlocking insulator suitable for covering a truncated triangular pipe, the conforming insulator having a base unit, a pair of side walls convergingly extending from the ends of the base unit and terminating with an apex unit. The insulator... | 06/30/1981 |
| 4273070 | Milking hose An elongated milking hose for a quarter milking machine. The milking hose has four elongated, flexible conduits, of which two conduits are connected to one another along a first common connecting segment, extending parallel with respect to the longitudina... | 06/16/1981 |
| 4269357 | Continuous drip irrigation tube A continuous drip irrigation tube having a series of longitudinally extending capillary tubes formed on its wall integrally with said wall.... | 05/26/1981 |
| 4262703 | Impact resistant control line An impact- and tension-resistant control line suitable for attachment to an underwater oil or gas flow line, for attachment to a downhole tubing string or for control in subsea workover operations. The control line protector includes a resilient elongated... | 04/21/1981 |
| 4256146 | Flexible composite tube A composite flexible tube is disclosed. The central portion of the core of the tube is formed of a plurality of hollow elements dipsosed concentrically about the longitudinal axis of the tube.... | 03/17/1981 |
| 4248298 | Well logging evaporative thermal protection system An evaporative thermal protection system for use in hostile environment well logging applications, the system including a downhole thermal protection cartridge disposed within a well logging sonde or tool to keep a payload such as sensors and support elec... | 02/03/1981 |
| 4240166 | Whirlpool system A whirlpool system has a pair of channels which connect sources of water and air to a plurality of outlets in a water receptacle. Each of the channels is formed in a continuous piece of tubing which is connected to the outlets by a plurality of connector ... | 12/23/1980 |
| 4227551 | Tube banks Flow restricting devices are provided for individual tubes connected into bores in a tube bank and are each formed with a convoluted passage of restricted cross-sectional area and extended length to produce a required flow restriction.... | 10/14/1980 |
| 4215092 | Apparatus for liquid portioning and liquid transferring A multichannel pipette is disclosed having an improved arrangement of replaceable tip containers in which the individual tip containers are connected together by flexible connecting members which are deformable to permit connection of the tip containers t... | 07/29/1980 |
| 4214147 | Electric heating system for controlling temperature of pipes to prevent freezing and condensation A tubular enclosure for a pipe which provides air-blanket insulation around the pipe, and an electric heater cable in the enclosure running along the underside of horizontal lengths of the pipe, cooperate in a system to prevent condensation of moisture on... | 07/22/1980 |
| 4194536 | Composite tubing product Elongate, deformable, composite tubing for use in maintaining or controlling the temperature of a fluid conveyed therethrough comprising one or more tubular fluid conveyance lines or one or more tubular fluid conveyance lines disposed in heat transfer rel... | 03/25/1980 |
| 4162865 | Method for laying carrier cables, such as telephone lines The invention relates to a method for laying carrier cables, more particularly telephone lines, comprising the steps of burying a bundle of pipes connected to a connection box supplied by a main cable, severing certain of the pipes forming part of the bun... | 07/31/1979 |
| 4149567 | Multi-core hydraulic duct A multi-core duct is constituted by a plurality of resilient conduits bunched together within a protective sleeve. Each of the conduits is formed from a high-strength synthetic plastics material and the protective sleeve is made of a flame-resistant synth... | 04/17/1979 |
| 4148341 | Long-distance heating conduit A long-distance heating conduit comprising one or more tubes which carry the heating medium, are laid in the conduit and are surrounded individually or jointly by at least one layer of heat-insulating material and are covered by at least one cover foil wh... | 04/10/1979 |
| 4147449 | Protection conduit line for laying underground cables An underground conduit-forming structure made of concrete for easily forming a protection conduit line for laying underground cables, e.g., power cables, communication cables, etc. For snug coupling between the leading and trailing structures, each struct... | 04/03/1979 |
| 4120168 | Apparatus for laying a pipeline in a body of water The invention consists of an apparatus for laying a pipeline, such as an oil duct or a gas duct, in a body of water, wherein the pipeline, or a section thereof, is enclosed within a ballast tube such that an intermediate space is formed between the pipeli... | 10/17/1978 |
| 4111235 | Pipe cap A cap for installation over the open end of a tubular member that has a pipe or pipes of smaller diameter projecting through the open end of the tubular member. The cap has a rubber discoid portion that covers the open end of the tubular member and a rubb... | 09/05/1978 |
| 4099560 | Open bottom float tension riser A marine riser, which is hung from a drilling platform floating on a body of water and connected at its lower end to a wellhead, is buoyantly tensioned by one or more float cans with open bottoms. These float cans are connected at their upper end to the r... | 07/11/1978 |
| 4098590 | Explosive gas pipeline A gas pipe has positioned in the interior thereof, and along the entire length thereof, a loose gas displacement body formed of an incombustible material, such as mineral wool or glass wool. The body may be a hollow cylinder divided longitudinally, and fu... | 07/04/1978 |
| 4092997 | Constraint means for flexible elements At least three elongated flexible elements bonded together lengthwise to form constraint means arcuate in cross-section for forcing said elements to move in a predetermined path in which the flexible elements are bent longitudinally to form a loop of subs... | 06/06/1978 |
| 4061354 | Structural unit for swingarms A motorcycle swingarm is shown in which each arm is an extrusion of lightweight metal which in cross-section is a diamond with a cross rib and integral upper and lower fins. The upper fin is the larger, and is shaped to taper from both ends. The arms are ... | 12/06/1977 |
| 4058257 | Irrigation emitter An irrigation emitter including a fixed longitudinally extending passage wall element having a longitudinally extending restricted flow groove therein, and a flexible longitudinally extending passage wall element overlying the fixed wall element and conta... | 11/15/1977 |
| 4052862 | Method of submerging pipelines The invention consists of a method and apparatus for laying a pipeline, such as an oil duct or a gas duct, in a body of water, wherein the pipeline, or a section thereof, is enclosed within a ballast tube such that an intermediate space is formed between ... | 10/11/1977 |
| 4046408 | Omni-directional fastener Flexible closure strips to be releasably interlocked wherein each of the closure strips has first and second sets of interlocking profiles with the first set facing in a first lateral direction and the second set facing in the opposite lateral direction a... | 09/06/1977 |
| 4031919 | Articulated riser An articulated riser including at least two framed structures comprised of a plurality of fluid-handling lines connected by multiple fluid-handling line flexible joints. The articulated riser of the present invention provides a system wherein fluid-handli... | 06/28/1977 |
| 4023596 | Securing means for minimum weight and volume structural supports A plurality of parallel constructed members that have means for securing the two parallel members together along an axis parallel to the longitudinal axis of the members to lend structural support of the members relative to each other. This allows the str... | 05/17/1977 |
| 4018271 | Flooring system A flooring system for sties and other animal shelters having thermoplastic slats, means provided in the slats for circulating a heat exchange fluid therethrough to heat or cool the flooring, means for joining the slats into a floor panel, and manifolds fo... | 04/19/1977 |
| 4016727 | Drain trough member and its connector A drain trough having longitudinally lined plastic round pipes and plastic connectors for connecting the pipes to each other in order to form a long drain trough. The plastic pipes each has slits longitudinally and intermittently extending and formed in t... | 04/12/1977 |
| 4015366 | Highly automated agricultural production system The present invention provides a highly automated agricultural production system which comprises, as essential components: 1. A sensing subsystem comprising direct and indirect sensing means in an agricultural production area. The direct sensing means are gene... | 04/05/1977 |
| 3951175 | External internal channels in glass tubing A method for forming integral internal channels defined by a wall with an annular cross-section inside high softening temperature glass tubing is described. In particular, a reduced pressure is provided inside a rotating tube with heating outside which so... | 04/20/1976 |
| 3938233 | Heat transfer apparatus An improved header construction for a heat transfer apparatus of the type utilizing a plurality of concentric, longitudinally extending tubes including an inner tube, an intermediate tube and an outer tube with the intermediate tube extending beyond the o... | 02/17/1976 |
| 3934615 | Segmented rigid insulated conduit This invention discloses an insulated, longitudinally segmented, rigid conduit containing several pipes of varying sizes. The conduit comprises any number of separate pipe carrying segments wherein the rigid casing, the rigid insulation, and the pipe cons... | 01/27/1976 |
| 3933181 | Long distance heating conduit in particular for hot water lines A long-distance heating conduit comprising one or more tubes conveying the heating medium, which tubes are supported in the conduit by support means consisting of an insulating material resistant to compression and surrounded by a heat-insulating material... | 01/20/1976 |
| 3932727 | Electrically heated riser pipe for a fluid supply system A prefabricated water supply system for supplying water from an underground source to mobile homes or stock tank waterers and the like includes a riser pipe encased within an outer pipe spaced from the riser pipe. A third hollow pipe is located adjacent t... | 01/13/1976 |
| 3930522 | Structural ceramic article and method of making same Sintered ceramic articles having a high surface area-to-weight ratio and containing a plurality of ducts that extend through the article to permit fluid flow therethrough are prepared by forming an extrudable admixture of pulverized ceramic material. The ... | 01/06/1976 |
